I have created a numpy array shape(11 x 11) with all pixels 0 excluding one column filled with 1. The array was saved as a png image using matplotlib.imsave yielding the expected image – black background with a white line in the middle. When trying to reimport the saved png image skipy.imread and Pil.Im…
Tag: scikit-image
xticks and yticks issues while using imshow
I’ve a problem with fixing the xticks and yticks for the imshow plot. When I use the single plot for imshow then the extent works better (see first figure below). However, when I use to insert the coordinates of the local maxima on the imshow plot then the ticks have changed (second figure). Can anybody…
module ‘skimage.data’ has no attribute ‘imread’
I used this code to read an image, but I got an error as “skimage.data” has no attribute “imread”. My skimage version is 0.18.1. What has to be changed in this to read an image? Answer The error is straightforward. You try to call the imread function in the data module, but there is no…
How to make a nxn filter to perform custom opertions in image array?
I am working with various images and I wanted to implement a method but I have no idea where to start. So I am looking forward to some suggestions. My idea as a method is to take an image array and after selecting a region of interest and then we say the selectedROI is 10×10 region of pixels as a
Skimage Rescale Segmentation Mask
Can somebody explain why I cannot use rescale() from here to rescale a segmentation mask? I tried the following: I’d expect the result to contain only ones, but this does not happen. What is the correct way of downscaling the height and width of a segmentation mask by half? Answer I think we can classif…
Detect rectangles in an image with Python
I have a large collection of binary images like these ones: On each image I need to detect the white rectangle. The rectangles have different dimensions and orientations and sometimes they are interrupted by a black line (see image 2). I think the problem is easy to solve if one could remove the noisy backgro…
How to upscale an image so that the result is not blurry or black?
I’m using the following code in order to upscale an image. However, this is not working as expected, as image2 becomes black. I really want to produce a new array, because I will be saving this array as an image to the file system. Specifically, I will create a gif animation from the upscaled version of…
How to de-skew a text image and retrieve the new bounding box of that image Python OpenCV?
Here’s a receipt image that I’ve got and I’ve plotted it using matplotlib and If you see the image the text in it is not straight. How can I de-skew and fix it? I think if we want to de-skew first we have to find the edges, so I tried to find the edges using canny algorithm and then get
How to merge a transparent png image with another image using Scikit-image
This is basically the same question that was posted here: How to merge a transparent png image with another image using PIL but using with scikit-image instead of PIL. I mean to paste the png keeping its transparency on top of a background image. Also, if there is actually a way of doing it, I would like to k…